anatomy:                tract tracing/stereology/synaptology
developmental biology:  embryology/cell culture/pre-, post-natal; lifespan
biophysics:             pre-, post-, and trans-synaptic electrophysiology
pharmacology:           receptor-effector systems/chemical signalling/secretory
cell biology:           physiology/biochemistry/physical chemistry
molecular biology:      gene expression, transcription, translation, modification
computer science:       modelling/network computing/AI(artificial intelligence) 
psychology:             cognitive science/behavioral science/ethnology